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need”作為情態(tài)動(dòng)詞的用法
一、need表示“需要”或“必須”,常常用于否定句,疑問(wèn)句,條件句.例如：1．You needn't do it again．你不需要重復(fù)做了.2．He needn't worry about it．這件事他無(wú)需擔(dān)心.3．Need he do this homework first?他需要先做這些作業(yè)嗎?4．Need they fill in the form?他們需要填表嗎?二、在否定句中,可以用need的否定形式＋不定式完成體.例如：1．We needn't have worried．其實(shí)我們不必要慌.2．You needn't have mentioned it．你本來(lái)不必提起這件事.3．You needn't have said that when he asked．當(dāng)他問(wèn)的時(shí)候,你其實(shí)不必要說(shuō).三、needn't后的不定式間或也能用進(jìn)行式或被動(dòng)語(yǔ)態(tài).例如：1．He needn't be standing in the rain．他不必要站在雨中.2．We needn't be waiting in this place．我們不必要在這兒等.3．The hedges needn't be trimmed thisweek．本周樹(shù)蘺不必要整修.四、其一般疑問(wèn)句的答語(yǔ),肯定用must,否定用needn't.Need I go with her?我需要和他一起去嗎?Yes,you must.是的,你需要去.No,you needn't.不,你不必去.
編輯本段“need”作為實(shí)義動(dòng)詞時(shí),常常用法是
人＋need ＋to do 物＋need ＋doing 物＋need ＋to be done 例如：The room needs cleaning = The room needs to be cleaned.房間需要打掃了.另外,“need”作實(shí)義動(dòng)詞時(shí)后還可以直接跟名詞.請(qǐng)看下面的例子：It is a question that needs very careful consideration．這是一個(gè)需要慎重考慮的問(wèn)題 很簡(jiǎn)單的方法區(qū)別情態(tài)動(dòng)詞與實(shí)義動(dòng)詞：當(dāng)need為情態(tài)動(dòng)詞時(shí),意思是“必要”,否定為"needn't",后面大多接動(dòng)名詞,表示動(dòng)作； 當(dāng)need為實(shí)義動(dòng)詞時(shí),意思是“需要”,否定為"don't need",后面大多跟名詞.
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